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Electric heat sealer with safety device

a technology of safety device and electric heat sealer, which is applied in the direction of ohmic-resistance heating, ohmic-resistance heating details, electrical equipment, etc., can solve the problems of accidental accident and no safety control means of electric heat sealers

Inactive Publication Date: 2005-08-30
CHOU SHU HUI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0020]In accordance with a further aspect of the present invention, there is provided an electric heat sealer comprising: a casing having an opening formed therethrough; first and second metal contact plates mounted within the casing below the opening; a sealing mechanism as described above, the sealing mechanism being mounted in the casing and moving up and down relative to the first and second metal contact plates; resilient means biasing the sealing mechanism in an upward direction so that the protrusive middle portion of the heat insulative base extends through the opening in the casing; op rating means pivotally connected to the casing and extending above the opening in the casing as described above; and a safety device which selectively prevents electrical current from flowing through the electric heating wire.

Problems solved by technology

However, these electric heat sealers have no safety control means.
When an electric heat sealer is touched by an external force, the sealing mechanism may be electrically connected to produce heat, potentially causing an accident to occur.

Method used

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Embodiment Construction

[0006]In accordance with one aspect of the present invention, there is provided an electric heat sealer comprising a casing, a battery chamber, a spring holder, a sealing mechanism, a press bar, and a safety device. The casing holds the battery chamber, the spring holder, the sealing mechanism and the safety device on the inside. The battery chamber comprises a front upright support; a rear upright support; a first front terminal plate and a second front terminal plate respectively mounted on the front upright support; a pair of rear terminal plates respectively mounted on the rear upright support; a first metal contact plate mounted on the front upright support and connected the first front terminal plate; and a second metal contact plate mounted on the front upright support and spaced from the second terminal plate by a gap. The second terminal plate is forced into contact with the second metal contact plate when a battery set is installed in the battery chamber. The spring holder...

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Abstract

An electric heat sealer for sealing workpieces such as plastic bags or the like includes a casing defining a battery chamber, a press bar pivotally connected to the casing, a sealing mechanism supported on a compression spring in a spring holder inside the casing, and a safety device. The sealing mechanism is electrically connected to produce heat for sealing the workpiece being put thereon when the press bar pressed against the sealing mechanism. The safety device breaks the electrical circuit when the apparatus is not in use.

Description

[0001]This application is a continuation of application Ser. No. 09 / 735,257, filed on Dec. 12, 2000, now U.S. Pat. No. 6,627,853, which is a continuation of application Ser. No. 09 / 189,359, filed on Nov. 9, 1998, which is a continuation-in-part of application Ser. No. 08 / 917,358, filed on Aug. 26, 1997, now U.S. Pat. No. 5,854,466.FIELD OF THE INVENTION[0002]The present invention relates to an electric heat sealer, and more particularly to an electric heat sealer which can be controlled to break the electric circuit when th apparatus is not in use, so as to prevent an electric connection by a false action.BACKGROUND OF THE INVENTION[0003]A variety of electric heat sealers have been developed for home use, and have appeared on the market. An example of such a device is disclosed in U.S. Pat. No. 5,142,123.[0004]Conventional electric heat sealers are functional for sealing plastic bags and the like. However, these electric heat sealers have no safety control means. When an electric he...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): B29C65/00B29C65/22B29C65/18H05B1/00
CPCB29C66/8161B29C66/861B29C66/874B29C66/1122B29C66/43121B29C66/8324B29C65/222B29C65/225B29C65/228B29C66/81821B29C66/8618B29C66/90B29C65/00B29C66/8122B29K2827/18B29C66/8221B29C66/849B29C66/8742
Inventor CHOU, SHU HUICHANG, RICHARD
Owner CHOU SHU HUI
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